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AR15.COM
5/11/2008 12:47:54 PM EDT
whats the difference between a single and two stage trigger?
5/11/2008 12:51:25 PM EDT
[#1]
One does a pole dance and a shower dance. The other just does a lap dance.
5/11/2008 1:08:09 PM EDT
[#2]
A single stage has one point of resistance. There will generally be a certain amount of 'pre-travel' and then you feel 'the wall'. You then increase pressure until the gun fires.

A two stage trigger will have two points of resistance after the pre travel. After the first point of resistance, there will be a lengthy travel to the next and final 'wall'. Then it behaves the same as a single stage, but often at much lighter weight than a typical single stage trigger.

Quality or desirable (match type) triggers will have very little or no perceptible pre-travel, and the same for over-travel, which is how far the trigger moves after the gun fires.

HTH
5/11/2008 3:01:32 PM EDT
[#3]
thanks.

For question number two, whats the difference between a vltor upper and say a BM upper.